Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
@ RUN: llvm-mc < %s -triple armv6k-elf -filetype=obj | llvm-objdump -d - | FileCheck %s .arch armv6k clrex: clrex @ CHECK-LABEL: clrex @ CHECK: f57ff01f clrex